Load Specifications
Load data in caliber 6.5-300 Weatherby Mag. with .264 | 140gr | Sellier & Bellot SP bullet and 49 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ADI AR 2218, Vihtavuori N570 and Alliant Reloder-33.
Important Notice: DO NOT go below Minimum Charge or above Maximum Charge. Since we have no control over the equipment and components used, any responsibility and liability for the results achieved is rejected.
Only powders/loads that match the current filter criteria are displayed: max pressure of a load ≤ 90% of max. standardized pressure, fill rate ≥ 80% and propellant combustion ≥ 95%. Use the sliders above the tables to adjust these thresholds.
Charge: Powder weight in grains. Start with the minimum load and work up carefully.
FR (Fill Rate): Case fill as a percentage. Values above 100% mean compressed loads.
MaxP / %: Maximum chamber pressure in bar and as a percentage of the standardized maximum for this caliber.
V(0): Muzzle velocity in feet per second (fps) at the standardized barrel length.
z (Powder Burn): Estimated propellant combustion percentage at bullet exit.
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Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 84% | 57,841 psi | 89% | 2936 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 54,012 psi | 83% | 2982 fps | 97.8% |
| Accurate MAGPRO | <<locked>> | 82% | 57,116 psi | 88% | 3048 fps | 99.7% |
| ADI AR 2209 | <<locked>> | 82% | 58,479 psi | 90% | 3018 fps | 100% |
| ADI AR 2213 | <<locked>> | 84% | 57,638 psi | 89% | 3041 fps | 100% |
| ADI AR 2217 | <<locked>> | 92% | 57,464 psi | 88% | 3031 fps | 100% |
| ADI AR 2218 | <<locked>> | 96% | 58,073 psi | 89% | 3166 fps | 99.2% |
| ADI AR 2225 | <<locked>> | 94% | 57,188 psi | 88% | 3051 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 58,117 psi | 89% | 3009 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 84% | 58,204 psi | 90% | 3035 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 84% | 56,420 psi | 87% | 2936 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 88% | 57,508 psi | 89% | 3018 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 92% | 56,014 psi | 86% | 3064 fps | 98.6% |
| Alliant Reloder-50 | <<locked>> | 96% | 56,507 psi | 87% | 3064 fps | 98.2% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 57,522 psi | 89% | 3002 fps | 99% |
| Bofors RP15 | <<locked>> | 86% | 57,653 psi | 89% | 3025 fps | 100% |
| Bofors RP30 | <<locked>> | 90% | 57,377 psi | 88% | 3041 fps | 100% |
| Bofors RP5 | <<locked>> | 84% | 58,204 psi | 90% | 3035 fps | 100% |
| Hodgdon H1000 | <<locked>> | 88% | 54,636 psi | 84% | 2986 fps | 100% |
| Hodgdon H4831 | <<locked>> | 82% | 55,999 psi | 86% | 2969 fps | 99.8% |
| Hodgdon H4831 SC | <<locked>> | 82% | 55,114 psi | 85% | 2956 fps | 99.7% |
| Hodgdon Retumbo | <<locked>> | 88% | 57,450 psi | 88% | 3114 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 38,159 psi | 59% | 1939 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 55,970 psi | 86% | 2943 fps | 99.8% |
| IMR 7828 SSC | <<locked>> | 84% | 56,289 psi | 87% | 3028 fps | 99.9% |
| IMR 7977 Enduron | <<locked>> | 90% | 58,421 psi | 90% | 2963 fps | 96.4% |
| IMR 8133 Enduron | <<locked>> | 96% | 56,101 psi | 86% | 3035 fps | 100% |
| Lovex S071 | <<locked>> | 88% | 56,275 psi | 87% | 2913 fps | 100% |
| Norma 217 | <<locked>> | 96% | 57,899 psi | 89% | 3061 fps | 100% |
| Norma MRP | <<locked>> | 82% | 58,363 psi | 90% | 3048 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 57,943 psi | 89% | 3051 fps | 100% |
| Ramshot Magnum | <<locked>> | 86% | 56,405 psi | 87% | 2979 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 39,131 psi | 60% | 1982 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 58,291 psi | 90% | 3097 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 57,290 psi | 88% | 3071 fps | 99.8% |
| Rottweil R 904 | <<locked>> | 82% | 58,581 psi | 90% | 2989 fps | 100% |
| Rottweil R 905 | <<locked>> | 82% | 58,160 psi | 90% | 3005 fps | 100% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 55,796 psi | 86% | 2989 fps | 97.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 57,783 psi | 89% | 3002 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 58,349 psi | 90% | 2972 fps | 100% |
| Vihtavuori N165 | <<locked>> | 86% | 58,479 psi | 90% | 2959 fps | 100% |
| Vihtavuori N170 | <<locked>> | 90% | 57,928 psi | 89% | 2999 fps | 97.7% |
| Vihtavuori N555 | <<locked>> | 82% | 58,088 psi | 89% | 2966 fps | 100% |
| Vihtavuori N560 | <<locked>> | 82% | 57,609 psi | 89% | 3051 fps | 99.9% |
| Vihtavuori N565 | <<locked>> | 86% | 55,434 psi | 85% | 2995 fps | 99.8% |
| Vihtavuori N568 | <<locked>> | 90% | 57,653 psi | 89% | 3074 fps | 99.6% |
| Vihtavuori N570 | <<locked>> | 90% | 55,100 psi | 85% | 3071 fps | 98.1% |
| Winchester StaBALL HD | <<locked>> | 84% | 58,044 psi | 89% | 3028 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 84% | 58,030 psi | 89% | 2969 fps | 100% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 80% | 50,662 psi | 78% | 2825 fps | 100% |
| Accurate 8700 | <<locked>> | 96% | 46,673 psi | 72% | 2844 fps | 95.9% |
| Accurate MAGPRO | <<locked>> | 80% | 53,243 psi | 82% | 2979 fps | 99.3% |
| ADI AR 2209 | <<locked>> | 80% | 54,737 psi | 84% | 2959 fps | 100% |
| ADI AR 2213 | <<locked>> | 80% | 50,082 psi | 77% | 2913 fps | 99.5% |
| ADI AR 2217 | <<locked>> | 80% | 37,724 psi | 58% | 2654 fps | 97.3% |
| ADI AR 2218 | 79.8 gr | 88% | 43,192 psi | 66% | 2858 fps | 95.3% |
| ADI AR 2225 | <<locked>> | 80% | 35,041 psi | 54% | 2625 fps | 99% |
| Alliant Reloder-19 | <<locked>> | 80% | 54,476 psi | 84% | 2949 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 80% | 50,807 psi | 78% | 2913 fps | 99.9% |
| Alliant Reloder-23 | <<locked>> | 80% | 49,588 psi | 76% | 2831 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 43,758 psi | 67% | 2785 fps | 100% |
| Alliant Reloder-33 | 79.4 gr | 86% | 44,904 psi | 69% | 2851 fps | 95.9% |
| Alliant Reloder-50 | <<locked>> | 90% | 45,339 psi | 70% | 2851 fps | 95.4% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 47,297 psi | 73% | 2815 fps | 97% |
| Bofors RP15 | <<locked>> | 80% | 47,485 psi | 73% | 2851 fps | 99.7% |
| Bofors RP30 | <<locked>> | 80% | 40,915 psi | 63% | 2730 fps | 98.2% |
| Bofors RP5 | <<locked>> | 80% | 50,807 psi | 78% | 2913 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 80% | 41,104 psi | 63% | 2733 fps | 98.8% |
| Hodgdon H4831 | <<locked>> | 80% | 52,388 psi | 81% | 2910 fps | 99.4% |
| Hodgdon H4831 SC | <<locked>> | 80% | 51,372 psi | 79% | 2890 fps | 99.3% |
| Hodgdon Retumbo | <<locked>> | 80% | 43,105 psi | 66% | 2854 fps | 99.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,601 psi | 44% | 1732 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 52,518 psi | 81% | 2887 fps | 99.5% |
| IMR 7828 SSC | <<locked>> | 80% | 49,023 psi | 75% | 2900 fps | 99.4% |
| IMR 7977 Enduron | <<locked>> | 88% | 54,766 psi | 84% | 2900 fps | 95.6% |
| IMR 8133 Enduron | <<locked>> | 82% | 34,983 psi | 54% | 2602 fps | 95.9% |
| Lovex S071 | <<locked>> | 80% | 43,787 psi | 67% | 2700 fps | 100% |
| Norma 217 | <<locked>> | 80% | 33,228 psi | 51% | 2566 fps | 97.4% |
| Norma MRP | <<locked>> | 80% | 54,636 psi | 84% | 2989 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 50,067 psi | 77% | 2923 fps | 99.7% |
| Ramshot Magnum | <<locked>> | 80% | 45,150 psi | 69% | 2789 fps | 99.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,515 psi | 45% | 1778 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 42,830 psi | 66% | 2828 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 80% | 39,421 psi | 61% | 2717 fps | 96.2% |
| Rottweil R 904 | <<locked>> | 80% | 54,897 psi | 84% | 2930 fps | 99.9% |
| Rottweil R 905 | <<locked>> | 80% | 54,433 psi | 84% | 2946 fps | 100% |
| SNPE Vectan SP 13 | <<locked>> | 94% | 45,281 psi | 70% | 2795 fps | 95.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 54,085 psi | 83% | 2940 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 54,534 psi | 84% | 2913 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 48,095 psi | 74% | 2792 fps | 99.9% |
| Vihtavuori N170 | <<locked>> | 84% | 47,398 psi | 73% | 2805 fps | 95.2% |
| Vihtavuori N555 | <<locked>> | 80% | 54,607 psi | 84% | 2910 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 53,925 psi | 83% | 2992 fps | 99.6% |
| Vihtavuori N565 | <<locked>> | 80% | 45,179 psi | 70% | 2802 fps | 98.5% |
| Vihtavuori N568 | <<locked>> | 80% | 40,277 psi | 62% | 2733 fps | 95.9% |
| Vihtavuori N570 | 74.6 gr | 84% | 44,498 psi | 68% | 2861 fps | 95.2% |
| Winchester StaBALL HD | <<locked>> | 80% | 50,096 psi | 77% | 2910 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 50,589 psi | 78% | 2848 fps | 99.9% |
Recommended = one of the top powders for this cartridge and bullet combination.
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 49 powders for 6.5-300 Weatherby Mag. loaded with the .264 | 140gr | Sellier & Bellot SP. ADI AR 2218 delivers the highest muzzle velocity at 3,166 fps; across all powders the maximum-charge window runs from 1,939 fps to 3,166 fps. Accurate 8700 gives the best case fill at 100 %, and 49 of the 49 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (448 MPa), the top charges use 59–90 %, leaving at least 10 % headroom. The 140.0 gr projectile in 0.264" calls for a 1:10.0 twist; slower twists will usually not stabilise this weight. Accurate 8700, Hodgdon TrailBoss, ReloadSwiss RS 14 reach 100 % fill or more at maximum charge, so these are compressed loads: they need a long drop tube to seat cleanly and react sensitively to the case capacity of your own brass lot. ADI AR 2218, Vihtavuori N570, Alliant Reloder-33 rank at the top here: for 6.5-300 Weatherby Mag. with the .264 | 140gr | Sellier & Bellot SP they combine a high case fill with complete burn and sit in the upper velocity band. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.